module teapo.app.storage.pluggable {

  export class LocalStorageImplementation implements Storage {

    private _editedKey: string;

    private _documentNamesKey: string;

    /**

     * Caching document names, with the side effect

     * that simultaneous access from multiple windows may race.

     */

    private _documentNames: string[] = null;

    globalProperties: PropertyAccess = null;

    constructor(

      private _localStorage,

      private _uniqueKey: string,

      populate: { edited: Date }) {

      this._editedKey = this._uniqueKey + '*edited';

      this._documentNamesKey = this._uniqueKey + '*documentNames';

      try {

        var edited = this._localStorage[this._editedKey];

        populate.edited = edited ? new Date(parseInt(edited)) : null;

      }

      catch (parseError) {

        populate.edited = null;

      }

    }

    documentNames(callback: (error: Error, names: string[]) => void) {

      if (!this._documentNames) {

        var documentNamesStr = this._localStorage[this._documentNamesKey];

        if (typeof documentNamesStr !== 'string')

          this._documentNames = [];

        else

          this._documentNames = documentNamesStr.split('\n');

      }

      callback(null, this._documentNames);

    }

    getDocument(fullPath: string, callback: (error: Error, docState: DocumentState) => void) {

      throw null;

    }

    removeDocument(fullPath: string, callback: (error: Error) => void) {

      throw null;

    }

    createDocument(fullPath: string, callback: (error: Error, docState: DocumentState) => void) {

      throw null;

    }

    loadMaster() {

      this.globalProperties = new LocalStoragePropertyAccess(this._localStorage, this._uniqueKey + '**');

    }

    loadSecondary(master: Storage, callback: (error: Error) => void) {

    }

  }

}